NAME

rteval - evaluate latency performance of a realtime Linux system

SYNOPSIS

rteval [ -hvsLSDOZ ] [-d duration ] [-w workdir ] [-l loaddir ] [-X host ]

The rteval program is used to evaluate the realtime performance of a realtime Linux kernel on a particular hardware system. There is nothing that actually requires a realtime Linux kernel, but the latency measurements will usually be pretty bad on a stock Linux kernel.

OPTIONS

These programs follow the usual GNU command line syntax, with long options starting with two dashes ('--').
A summary of options is included below.

-h, --help

print a help message

-d, --duration=DURATION

Specify the length of the measurement run. DURATION is an integer with an optional suffix indicating the units:

s - seconds
m - minutes
h - hours
d - days
for example to execute a ten minute run of rteval:
$ rteval --duration=10m

-v, --verbose

Increase the verbosity of output during the test run

-w WORKDIR, --workdir=WORKDIR

Tell rteval to change directory to WORKDIR before creating any subdirectories for report files. The default WORKDIR is the directory in which rteval was started.

-l LOADDIR, --loaddir=LOADDIR

Tell rteval where to find the source for the loads

--loads-cpulist=CPULIST

List of CPUs where loads will run

--measurement-cpulist=CPULIST

List of CPUs where measurement applciation will run

-s, --sysreport

Have rteval run the sysreport utility after a run to gather information on the running system.

-D, --debug

Turn on debugging prints during run

-X HOST, --xmprpc-submit=HOST

Have rteval send report data to HOST following the run, using XML-RPC

-P, --xmlrpc-no-abort

Do not abort if XML-RPC server do not respond to ping request

-Z, --summarize

Have rteval summarize an existing report. This will not cause loads or meausurement utilities to be run.

-H, --raw-histogram

Generate raw histogram data for an already existing XML report

-f INIFILE, --inifile=INIFILE

Initialization file for configuring loads and behavior

-a COMMENT, --annotate=COMMENT

Add a little annotation which is stored in the report

-L, --logging

Log the output of the loads in the report directory

-O, --onlyload

Only run the loads (don't run measurement threads)

MODULE OPTIONS

These are options that affect the execution behavior of the measurement and load modules.

--cyclictest-priority=PRIORITY

SCHED_FIFO priority for measurement threads (default: 95)

--cyclictest-interval=INTERVAL

Measurement thread interval in microseconds (default: 100)

--cyclictest-distance=DISTANCE

Interval increment in microseconds (default: 0)

--cyclictest-buckets=NBUCKETS

Number of 1 microsecond histogram buckets (default: 2000)

--hackbench-jobspercore=N

Number of jobs per online-core for hackbench load

--kcompile-jobspercore=N

Number of jobs per online-core for kernel compile load

FILES

rteval-YYYYMMDD-S This is a directory created by rteval to hold the summary.xml file as well as other files collected on the system. It is the current Year, Month, and Day, followed by a sequence number for multiple runs on the same day.

summary.xml This is an XML file that contains information about a test run and the host system upon which rteval was run. dmesg This is the output of the dmesg(1) program immediately following system boot. It is copied from /var/log/dmesg.

SEE ALSO

cyclictest(8).

AUTHOR

rteval was written by Clark Williams <williams@redhat.com>

XML-RPC and database code by David Sommerseth <davids@redhat.com>